diff --git a/pkgs/development/libraries/haskell/diagrams/postscript.nix b/pkgs/development/libraries/haskell/diagrams/postscript.nix
index 55e2c975b0eb..29dbafb890fd 100644
--- a/pkgs/development/libraries/haskell/diagrams/postscript.nix
+++ b/pkgs/development/libraries/haskell/diagrams/postscript.nix
@@ -5,8 +5,8 @@
 
 cabal.mkDerivation (self: {
   pname = "diagrams-postscript";
-  version = "1.0.2.4";
-  sha256 = "0vjzvjyrbmnjgl8ln58a44nhh4abq5q2c6fvlpxpfhxh2ligsmas";
+  version = "1.1";
+  sha256 = "0l077libp6h8ka9ygkmajvzdymndlhx60nb5f6jaqvp7yx80hz3m";
   buildDepends = [
     dataDefaultClass diagramsCore diagramsLib dlist filepath hashable
     lens monoidExtras mtl semigroups split vectorSpace